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Is it safe to use FirefoxSync (PC<->Mobile) ?

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Are my passwords, usernames and bookmarks stored securely at servers? Why not a password generator? also, Can we add our phone number for remember master password?

Are my passwords, usernames and bookmarks stored securely at servers? Why not a password generator? also, Can we add our phone number for remember master password?

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I have started to use a password manager. It is useful for me. Thank you for your support.

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Sync is not a data backup service. Users should continue to perform regular backups of their Firefox profiles to prevent loss of data.

Sync lets you share your data and preferences (such as your bookmarks, history, passwords, open tabs and installed add-ons) across all your devices.

For more info, see https://support.mozilla.org/en-US/kb/how-do-i-set-sync-my-computer

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I have started to use a password manager. It is useful for me. Thank you for your support.

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you're welcome